Something went wrong, please try again later. Invalid email Something went wrong, please try again later. Want the day's sports headlines straight to your inbox? Our FREE newsletter will keep you ahead of the game Trace the history of Irish sport and it's largely a tale of emigration and immigration. Many of America's earliest Olympic heroes – like Martin Sheridan, Paddy Ryan and Pat McDonald – were born in Ireland. Irishmen played a huge role in the growth of professional boxing in the US and Britain. And the impact on the biggest global sport of all – football – is…